Smoke-consuming furnace.



No. 871,090. PATBNTED NOV. 12, 1907. F. E. KELLY.

SMOKE CONSUMING FURNACE.

APPLICATION mum 0014. 190a.

UNITED STATES PATENT OFFICE.

FRANK E. KELLY, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF ONE-HALF TOFREDERICK KEES, OF MINNEAPOLIS, MINNESOTA.

SMOKE-CONSUMING FURNACE.

Specification of Letters Patent.

Application filed October 4.1906. Serial No. 337,403.

Llo all whom it may concern:

Be it known that I, FRANK E. KELLY, of Minneapolis, Hennepin county,Minnesota, have invented certain new and usefol improvements inSmoke-Consum- 5 ing Furnaces, of which the following is a specification.

My invention relates to furnaces and the object of the invention is toprevent the formation of clinkers on the grate and provide for a morecomplete combustion of the fuel.

I am aware that it is old to introduce streams of water into thefurnaces beneath the grate bars either with or without the agency of anair blast, and 1 therefore do not in this application make claim broadlyto such construction.

My invention consists generally in the manner of mixing the liquid withan air blast and the delivery of the moisture laden. air to the grate.

In the accompanying drawings, forming part of this specification, Figurel is a sectional view of the tire box of a furnace or boiler showing themanner of delivering the moisture laden air beneath the grate Fig.

2 is a transverse sectional view oi the same substantially on a line9t-;t of Fig. .l.

Fig. 3 is a detail sectional View illustrating the manner of deliveringthe liquid to the blast fan.

in the drawings, 2 represents a boiler, 3 the front 01' the fire box asindicated in Fig. 2.

These boxes 8 each have a series of holes 9 communicating with the spacebeneath the grate bars.

These boxes, as shown, are

set into the masonry and are flush substantially with the vertical sidewalls of the fire box, so that they do not obstruct in any 'way thespace beneath the grate, and the holes in the boxes are protected torevent ashes from falling therein.

10 represents pipes extending downwardly from the boxes 8 andcommunicating with a pipe 11. that extends to a fan casing 12 having ablast fan 13 driven from a belt 14.

"he fan casing 12 has the usual side opening 15 and opposite andcontiguous to said opening is a deflector l6 semia water supply pipe 17.

circular in form, mounted on A plate 18 oppositely curved from thedeflector 16 is mounted on arms 19 directly in front of the dischargeend of the pipe 17 which is inserted through the middle portion of thedeflector 16. A stream of water projected against the plate 18 will bedeflected thereby upon the deflector l6 and from thence directed intothe interior of the fan casing through the opening 15.

The Water as it enters the casing will be in the form of a spray or thinsheet and upon being struck by the rapidly revolving fan will beatomized and mingled with the air which laden with the vapor will bedriven through the pipes 10 into the boxes 8 and from thence into thespace beneath the grate where it will be evenly distributed and risingthrough the grate bars will mingle with the burning fuel and airmaterially in producing more perfect com- Patented Nov. 12, 1907.

bustion and preventing the formation of clinkers.

l have found that water introduced directly into the fan casing will bemore thoroughly atomized and the air will be more completely and uniformly charged and will be delivered to the grate in better conditionfor promoting combustion than where the fan is located in one place andthe water introduced at another as has been customary in devices of thiskind heretofore l have found that the action of the fan will sothoroughly separate the particles of water and mix them with the aircurrent that upon its entry into the fire box it will contain the properproportion of moisture to produce the best results with the burningfuel. The speed of the fan can be regulated as desired and the volume ofwater delivered thereto will also be governed by the character of thefuel employed and the percentage of moisture in the air roquirml toprevent iormation of clinker-s and produce as nearly as used.

possible perfect combustion.

1 claim as my invention:

1. The combination, with a furnace grate and its lire box, of plenumboxes arranged in the side walls of said lire box on each side of thegrate and below the level of the same and extending" from end to end ofsaid tire box, said plenum boxes having a series of perforations intheir side walls opening into said lire box, a pipe extending un dersaid tire box and having branch pipes extending laterally to the sidesof the tire box and upwardly into the mid die portion of said plenumboxes, a blast fan connected with said first named pipe, and menus fordelivering water into the path of said fan, whereby it will be atomizedand the moisture laden currents of air discharged through theperforations in said plenum boxes into said tire box, substantially asdescribed.

path of said fan.

In witness whereof, I have hereunto set my hand this 29th day ofSeptember 1006.

Witnesses:

RICHARD PAUL, J. B. EVA.

FRANK n. KELLY.

